CN2323332Y

CN2323332Y - Cold and heat circulation device for plastics dryer

Info

Publication number: CN2323332Y
Application number: CN 98200255
Authority: CN
Inventors: 陈健发
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-09
Filing date: 1998-01-09
Publication date: 1999-06-09
Anticipated expiration: 2008-01-09

Abstract

The utility model relates to a cold and heat circulation device for plastic driers. A branch pipe is connected fixedly to the lower part of a blower of the utility model. The lower end of the branch pipe is connected with a heating pipe, and the side end of the branch pipe is connected with a conveying pipe which is connected with a decompression pipe of the upper end of a drying cylinder. By making used of the principle of the difference between positive pressure and negative pressure, hot air is stored and pressed in the drying cylinder, so as to generate heat circulation. Plastic in a lower half part in the drying cylinder is quickly dried. With fast heating and energy saving, materials are easy to feed into a material pipe of a molding machine, and moisture is easy to exhaust. The efficiency of the drier is increased by more than 40%. In addition, the service life of the blower is prolonged, temperature in a workshop is reduced, the exhaust of dust is reduced, etc.

Description

The hot and cold EGR of plastic dryer

The utility model relates to a kind of hot and cold EGR of plastic dryer, and it is applicable to the heating, drying machinery of plastic material.

Existing plastic dryer can be divided into three kinds dissimilar, below three kinds dissimilarly are described as follows according to drawing:

Fig. 1, Figure 2 shows that the stereogram and the flow chart of first kind plastics drying, this plastic dryer 1 is outside the drying 11 air blast 12 to be arranged, this air blast 12 can be with the hot gas in the drying 11 by last extraction, earlier through behind the filter 13 again through recovery tube 14, and going into the bottom of drying 11 by heating tube 15, other has an electric cabinet 16 to control machine operation and temperature.

Fig. 3, Figure 4 shows that the stereogram and the flow chart of the second class plastic drying, this plastic dryer 2 is outside the drying 21 air blast 22 to be arranged, this air blast 22 can be with the hot gas in the drying 2 by last extraction, behind recovery tube 24, pass through earlier filter 23 again, and going into the bottom of drying 21 by heating tube 25, other has an electric cabinet 26 to control machine operation and temperature.

Aforementioned two kinds of plastic dryers the 1, the 2nd, after utilizing the hot gas cycle mode will discharge hot gas to reclaim again heating go in the tube, reaching the effect of power saving, but have following multinomial shortcoming:

1, heat time heating time long, temperature is the highest can only to arrive 140 ℃-150 ℃, can only can't dry (need be heated to more than 200 ℃ at least) to engineering plastic at the oven dry of general plastic cement.

2, air blast sucks hot blast, can make the internal bearings equipment make the lubricating oil volatilization because of being heated for a long time, causes damage of bearings, and motor running has some setbacks, and reduces service life.

3, moisture exhausting is difficult in the drying, causes the Jet forming machine pipe to block and nozzle blockage.

4, aluminium

matter recovery tube

14,24 is heated for a long time and easily causes distortion.

5, the hot gas in filter 13, the 23 direct filtration drying tubes, thus dust overstock easily, so need constantly or regularly to remove dust or change the outfit filter material.

6, to take out, put all be hot-air to air blast, so the hot gas that gives off influences temperature, especially summer in the factory building.

Fig. 5, Figure 6 shows that the stereogram and the flow chart of the 3rd class plastic drying, this plastic dryer 3 is outside the drying 31 air blast 32 to be arranged, this air blast 32 can be taken out cool ambient air and goes in the heater 33, and goes into drying 31 inner bottom parts through input pipe 35 again after heating tube 34 heating.The top of drying 31 has a discharge elbow 36 with discharging hot gas, and machinery is then controlled by electric cabinet 37 with temperature controlling.

The advantage of this plastic drying machine 3 is can be with the preheating of air elder generation, and reducing electric heating consumption, and heating-up temperature can reach 230 ℃, and aqueous vapor can be discharged by the tube top.

But still the following shortcoming of tool:

1, preheating time oversize, waste the too many time.

2, hot gas is discharged by the tube top, influences temperature, especially summer in the factory building.

3, dust is discharged with hot gas, and dirty degree improves, and influences the factory building inner air.

4, the heating tube maintenance changes the outfit difficult.

5, if will be heated to very power consumption of high temperature, and the stand-by period is longer.

The purpose of this utility model provides a kind of hot and cold EGR of plastic dryer, and it utilizes the positive and negative pressure principle that hot gas is pressed in the tube, and drying efficiency is strengthened more than 40%, and temperature can be up to 300 ℃, and heating fast, saves electric energy; Dust and plastics can be blocked in drying, dust is difficult for dispersing; What relief pipe was discharged is cold air, but not hot-air, so do not influence the interior temperature of factory building; Air blast does not suck hot gas, so do not influence the air blast internals, can increase service life, and air blast does not discharge hot gas again, so can not influence the temperature in the factory building; Owing to the hot gas in the drying is not extracted out, so filter material does not need Chalk-dust filtering, only need to filter the air that enters, thus be difficult for blocking, and the cleaning filter screen is simple and easy fast.

For achieving the above object, the utility model is taked following design: a kind of hot and cold EGR of plastic dryer, it includes the air blast of a drying, an air-breathing usefulness, the input pipe that a heating tube, is connected heating tube and drying bottom, one electric cabinet, it is characterized in that: a fixedly connected branch pipe under the air blast, this branch pipe lower end connects heating tube, and the branch pipe side connects a carrier pipe, and this carrier pipe is connected with a relief pipe of drying upper end.

Aforementioned branch pipe is combined with a bend pipe by a threeway sleeve to be formed, wherein the threeway sleeve pipe is one to be responsible for looped pipeline is vertical and to be connected moulding, pore junction the looped pipeline and the person in charge is provided with a block, block is so that air back in entering the person in charge produces choked flow, and make major and minor pipe internal pressure balance, and make the part air can enter looped pipeline, and then when person in charge's flow velocity is too fast, avoid looped pipeline to produce vacuum pressure and cause hot gas to reflux.Looped pipeline and bend pipe junction are provided with a filter material.

Relief pipe is made up of a bend pipe and a blank pipe, two interlayer pieces again, and wherein, bend pipe has a vertical small de-air hole, and this steam vent and makes the pressure in the drying be able to suitable maintenance so that little air is discharged.And making air give earlier, blank pipe subtracts after the filter material of two interlayer central authorities reenters in drying.

In addition the air intake vent of air blast adds the sound cover that goes out, and this sound cover that goes out is provided with a fixture block and outward and adjusts lid, and has a filter material in the folder lid, and the sound cover can reduce noise and filtered air by going out.

Aforementioned filter material is to insert and put a filter cotton piece by two wire netting sheets.

After air blast is with the outside air suction, air is flowed in upper and lower two pipes, last pipe is a cold air input pipe, following pipe is a hot-air input pipe, two air compile the positive negative pressure of generation in drying, and then make the hot gas pressure accumulation in drying, and make the rapid draing of Lower Half plastics, and make make-up machine material pipe pan feeding easy, and moisture exhausting is also easy.

Compared with the prior art the utility model has following advantage

1, utilize the positive and negative pressure principle that hot gas is pressed in the tube, drying efficiency is strengthened more than 40%, temperature can be up to 300 ℃, and heating fast, saves electric energy.

2, dust and plastics can be blocked in drying, dust is difficult for dispersing.

What 3, relief pipe was discharged is cold air, but not hot-air, so do not influence the interior temperature of factory building.

4, air blast does not suck hot gas, so do not influence the air blast internals, can increase service life, and air blast does not discharge hot gas again, so can not influence the temperature in the factory building.

5, owing to the hot gas in the drying is not extracted out,, only need to filter the air that enters so filter material does not need Chalk-dust filtering, thus be difficult for blocking, and the cleaning filter screen is simple and easy fast.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is prior art plastic dryer (one's) a stereogram

Fig. 2 is prior art plastic dryer () flow chart

Fig. 3 is prior art plastic dryer (twos') a stereogram

Fig. 4 is prior art plastic dryer (twos') a flow chart

Fig. 5 is prior art plastic dryer (threes') a stereogram

Fig. 6 is prior art plastic dryer (threes') a flow chart

Fig. 7 is the stereogram of the utility model plastic dryer

Fig. 8 is the flow chart of the utility model plastic dryer

Fig. 9 is the three-dimensional exploded view of the utility model branch pipe

Figure 10 is the plane of the utility model branch pipe

Figure 11 is the three-dimensional exploded view of the utility model relief pipe

Figure 12 is the plane of the utility model relief pipe

Figure 13 is the three-dimensional exploded view of the utility model air blast

Figure 14 is the plane of the utility model air blast

Referring to Fig. 7, shown in Figure 8 is stereogram of the present utility model and flow chart, disclosing a plastic dryer 30 among the figure is to comprise: a drying 10, the air blast 4 of one air-breathing usefulness, one is located at the branch pipe 5 under the air blast, one is connected the heating tube 6 under the branch pipe 5, (this Guan Yike is divided into two pipes 71 to the input pipe 7 of one connection heating tube 6 and drying 10 bottoms, 72, wherein, pipe 71 is connected with heating tube 6 one, manages 72 and is connected with drying 10 one), one is connected the carrier pipe 8 of branch pipe 5 sides, one is connected the relief pipe 9 of carrier pipe 8 and drying 10 upper ends, an and electric cabinet 20; 4 times fixedly connected branch pipes 5 of air blast, these branch pipe 5 lower ends connect heating tube 6, and branch pipe 5 sides connect a carrier pipe 8, and this carrier pipe 8 is connected with a relief pipe 9 of drying 10 upper ends.Aforementioned air blast 4 is in the outside air suction branch pipe 5, and wherein a part of air is entered by the bottom of drying 10 through input pipe 7 after heating tube 6 heating; And another air is entered by drying 10 tops through a relief pipe 9 after carrier pipe 8 is carried.Hot and cold two air compile the back and produce positive negative pressure in drying 10, and then make the hot gas pressure accumulation in drying 10, and make the rapid draing of Lower Half plastics, and make make-up machine material pipe (not shown) pan feeding easy, and moisture can be discharged by the exhaust hole 911 on relief pipe 9 tops easily.

As Fig. 9, shown in Figure 10, it is respectively the three-dimensional exploded view of branch pipe, plane, this branch pipe 5 is made up of a threeway sleeve pipe 51 and a bend pipe 52, wherein, threeway sleeve pipe 51 is to be responsible for 511 by one to be connected moulding with looped pipeline 512 is vertical, but it is poor in order not produce vacuum pressure between making looped pipeline 512 and being responsible for 511, special pore junction the looped pipeline 512 and the person in charge 511 is provided with a block 513, this block is a skewback, and skewback is located at the end that pore 514 edge of opening and position enter at air, after air enters the person in charge 511, be subjected to stopping of block 513 and produce choked flow, and then make the master, pressure keeps balance between secondary two pipes, and the part air can be entered in the looped pipeline 512, when flow velocity is too fast, cause looped pipeline 512 to produce vacuum pressures and hot gas is refluxed and go out that (this principle is visible on spray gun to avoid being responsible for 511, the sagging direct-connected liquid barrel that connects of spray gun for example, when spray gun ejection gas, cause and produce vacuum pressure in the barrel, enter in the spray gun and liquid is up refluxed by barrel, and take out of) by air disease stream.In addition, 52 clampings of looped pipeline 512 and bend pipe, one fixture block 53 has a filter material 54 and is used for filtered air in fixture block, and this filter material is by two wire netting sheets, 541 clampings, one filter cotton piece 542.

As Figure 11, shown in Figure 12 be relief pipe three-dimensional exploded view, plane, relief pipe 9 is connected to blank pipe 92 under the bend pipe 91, is formed with two interlayer pieces 93 that are fixed under the blank pipe 92 by a bend pipe 91.Wherein, the endoporus of blank pipe 92 is a taper hole 921, after air enters blank pipe 92, be subjected to the effect of contraction of taper hole 921 and quickly go in the drying 10, clamping a filter material 94 between the two interlayer pieces 93 again, this filter material is by two wire netting sheets, 941 clampings, one filter cotton piece 942, and filter material 94 filters the air that passes through.Secondly, has a small de-air hole that vertically runs through 911 in the corner that becomes pipe 91, this steam vent can make little air (non-hot gas) and aqueous vapor discharge, and then (this and pressure cooker are with the vexed cooking food of air pressure to make drying 10 interior pressure accumulations be continued maintenance, and with the suitable exhaust of a steam vent, and make the principle that food is boiled fast identical).

Three-dimensional exploded view, plane as Figure 13, air blast shown in Figure 14, the air intake vent that discloses air blast 4 among the figure adds the sound cover 41 that goes out, these sound cover 41 outer fixture blocks 42 that set firmly that go out, fixture block contains a filter material 44, cover 43 and fix an adjustment with a bolt 45 outside the fixture block, adjust lid have a protruding handle 431 can movable rotation after for operator's two banjo splints, and then blowhole mouth 421 sizes of change fixture block 42, filter material 44 is by two gold medal layer net sheets, 441 clampings, one filter cotton 442 again, can reduce noise and filtered air by structures such as the aforementioned sound covers 41 that goes out.

Claims

1, a kind of hot and cold EGR of plastic dryer, it includes the air blast of a drying, an air-breathing usefulness, the input pipe that a heating tube, is connected heating tube and drying bottom, one electric cabinet, it is characterized in that: a fixedly connected branch pipe under the air blast, this branch pipe lower end connects heating tube, the branch pipe side connects a carrier pipe, and this carrier pipe is connected with a relief pipe of drying upper end.

2, the hot and cold EGR of plastic dryer according to claim 1 is characterized in that: branch pipe is made up of a threeway sleeve pipe and a bend pipe.

3, the hot and cold EGR of plastic dryer according to claim 2 is characterized in that: this threeway sleeve is to be responsible for looped pipeline is vertical by one to be connected moulding, and in the pore junction of the person in charge, looped pipeline one block is set.

4, the hot and cold EGR of plastic dryer according to claim 3 is characterized in that: this block is a skewback, and skewback is located at looped pipeline pore edge of opening, and the end that enters at air of position.

5, the hot and cold EGR of plastic dryer according to claim 3 is characterized in that: clamping one fixture block between looped pipeline and bend pipe has a filter material in fixture block.

6, the hot and cold EGR of plastic dryer according to claim 1, it is characterized in that: relief pipe by a bend pipe, be connected to the blank pipe under the bend pipe, two interlayer pieces that are fixed under the blank pipe are formed, and the endoporus of blank pipe is a taper hole, and the corner of bend pipe has a small de-air hole that vertically runs through.

7, the hot and cold EGR of plastic dryer according to claim 6 is characterized in that: but clamping a filter material between the two interlayer pieces.

8, the hot and cold EGR of plastic dryer according to claim 1, it is characterized in that: the air intake vent of air blast adds the sound cover that goes out, this sound cover that goes out sets firmly a fixture block outward, and fixture block is outer adjusts lid with a bolting one, adjusts the movable rotation of lid to change the blowhole mouth size of fixture block.

9, the hot and cold EGR of plastic dryer according to claim 8 is characterized in that: clamping a filter material in the fixture block.

10, the hot and cold EGR of plastic dryer according to claim 1, it is characterized in that: input pipe can be divided into two pipes, and a pipe is connected with heating tube bottom one, and another Guan Zeyu drying bottom one connects.